1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    *
5    *
6    *
7    * The contents of this file are subject to the terms of the Liferay Enterprise
8    * Subscription License ("License"). You may not use this file except in
9    * compliance with the License. You can obtain a copy of the License by
10   * contacting Liferay, Inc. See the License for the specific language governing
11   * permissions and limitations under the License, including but not limited to
12   * distribution rights of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portal.dao.jdbc.aop;
24  
25  import com.liferay.portal.kernel.util.StringPool;
26  
27  import java.lang.reflect.Method;
28  
29  import org.aopalliance.intercept.MethodInvocation;
30  
31  import org.springframework.transaction.interceptor.TransactionAttribute;
32  import org.springframework.transaction.interceptor.TransactionAttributeSource;
33  import org.springframework.transaction.interceptor.TransactionInterceptor;
34  
35  /**
36   * <a href="DynamicDataSourceTransactionInterceptor.java.html"><b><i>View Source
37   * </i></b></a>
38   *
39   * @author Michael Young
40   */
41  public class DynamicDataSourceTransactionInterceptor
42      extends TransactionInterceptor {
43  
44      public Object invoke(MethodInvocation methodInvocation) throws Throwable {
45          Class<?> targetClass = null;
46  
47          if (methodInvocation.getThis() != null) {
48              targetClass = methodInvocation.getThis().getClass();
49          }
50  
51          Method targetMethod = methodInvocation.getMethod();
52  
53          TransactionAttributeSource transactionAttributeSource =
54              getTransactionAttributeSource();
55  
56          TransactionAttribute transactionAttribute =
57              transactionAttributeSource.getTransactionAttribute(
58                  targetMethod, targetClass);
59  
60          if ((transactionAttribute != null) &&
61              (transactionAttribute.isReadOnly())) {
62  
63              _dynamicDataSourceTargetSource.setOperation(Operation.READ);
64          }
65          else {
66              _dynamicDataSourceTargetSource.setOperation(Operation.WRITE);
67          }
68  
69          StringBuilder sb = new StringBuilder();
70  
71          sb.append(targetClass.getName());
72          sb.append(StringPool.PERIOD);
73          sb.append(targetMethod.getName());
74  
75          _dynamicDataSourceTargetSource.pushMethod(sb.toString());
76  
77          Object returnValue = null;
78  
79          try {
80              returnValue = super.invoke(methodInvocation);
81          }
82          finally {
83              _dynamicDataSourceTargetSource.popMethod();
84          }
85  
86          return returnValue;
87      }
88  
89      public void setDynamicDataSourceTargetSource(
90          DynamicDataSourceTargetSource dynamicDataSourceTargetSource) {
91  
92          _dynamicDataSourceTargetSource = dynamicDataSourceTargetSource;
93      }
94  
95      private DynamicDataSourceTargetSource _dynamicDataSourceTargetSource;
96  
97  }